"Dost" contd.:

If the idea is that "thou ... who" (or "you ... who") always takes the third person, I am not quite convinced either. In "you are the one who ...", "the one" becomes the actor, so the third person is mandatory. But would you say "You, who do all the work, should be rewarded!" or "You, who does all the work, should be rewarded!"? The former is Rutton's understanding, and seems more natural to me as well, but native speakers should vote. I would never say "I, who does all the work, ...", mainly because I refuse to do all the work anyway.